JPS62163903A - Extending conductive element of insulating object to be inspected - Google Patents

Abstract

PURPOSE:To eliminate electric leakage to an object to be inspected or in which an extending conductive element incorporated when in service, by forming at least one side of an extending conductive sheet in an insulation state. CONSTITUTION:This element has extending conductive sheet 3 of which electric resistance value decreases when an extension is applied in a desired direction, two electrodes 4 and 4' mounted at a specified interval in the extending direction of the extending conductive sheet 3 and at least one side thereof is formed insulated. For example, an dielectric breakdown film 2 are laminated on both sides of the extending conductive sheet 3 and a copper electrode plate 4 is mounted at both sides of the laminate by a conductive resin 5. A lead 7 is connected to the electrode plate 4 at the both ends by a soldered part 6. In addition, the extending conductive sheet 3 is wrapped by electrically insulated elastomer containing the electrode plate 4 and the lead near the electrode plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an elongated groove cross rope. More specifically, the present invention relates to an elongated conductive cord having at least one side insulated.

<Prior Art> There are cases where it is necessary to detect large elongation deformations such as bending parts of the human body, such as elbows and knees.

For such detection, it is conceivable to adopt either a method of using a material whose resistance value decreases at once by elongation deformation or a method of using a material whose electrical resistance value increases by elongation deformation.

However, until now, no material has been known that has the property of decreasing electrical resistance due to elongation deformation, and therefore, by capturing the decrease in electrical resistance caused by elongation deformation, the object to be inspected can be inspected. Elements capable of detecting the presence or absence of elongation, the extent of elongation, and the frequency of elongation and compression had not been developed.

Therefore, it is conceivable to detect elongated deformation using an element that takes full advantage of the property that the electric resistance value increases due to elongated deformation, such as a strain gauge. When a thin metal rim of a strain gauge, such as Constance, Advance, or Nichrome, is pulled, its electrical resistance increases, and this property is used to make strain gauges. However, since the elongation rate of this type of gold V4 wire is extremely small (1% or less), the strain gauge described above can only handle minute deformations of the test object. It cannot be used to detect elongation deformation.

On the other hand, piezoelectric elements and elements using pressure-sensitive conductive rubber are known as elements for detecting deformation of a test object.

However, piezoelectric elements detect mechanical strain and deformation as voltage changes, but like strainage, they are only suitable for applications that require minute deformation. Furthermore, the latter pressure-sensitive conductive rubber has an electrical resistance value that decreases when subjected to compressive deformation, but does not cause a decrease in electrical resistance value when subjected to elongated deformation.

As mentioned above, conventionally known elements can only be used for minute extensional deformations or only for compressive deformations. Therefore, conventionally known elements cannot detect elongation deformation, especially the elongation behavior of a specimen undergoing a considerable amount of elongation deformation, that is, the presence or absence of elongation, the degree of elongation, the frequency of compression accompanied by elongation, etc.

<Problems to be Solved by the Invention> As described above, it is not possible to electrically detect elongation deformation, especially elongation behavior to a considerable extent, using conventionally known elements. Therefore, the same applicant as the present invention has proposed a sheet-like material that can be used to visually detect the elongation behavior of the corresponding a.

For example, the first sheet was released on September 27, 1982.
This is a sheet described in Japanese Patent Application No. 59-200577 filed under the name of "Deformed Conductive Polymer Elastomer" in 1999, which is a sheet in which a conductive filler in the form of flakes is added to an insulating polymer nidistomer. This sheet improves conductivity in the stretching direction when stretched in a direction parallel to the filler surface. The second sheet-like material was produced in March 1985.
A sheet-like product described in Japanese Patent Application No. 60-41024 filed under the name of "Deformed Conductive Knitted Fabric" on May 4, 1987, which consists of intertwined parts and intertwined parts of the constituent yarns. This is a deformable grooved pigeon fabric whose electrical resistance value changes when it is stretched in any direction because it is formed so that the electrical conductivity or ventilation insulation between the parts satisfies the following conditions. .

■ Among all the intertwined parts in a predetermined area of the knitted fabric,
The number of electrically insulated intertwined parts is t! And how many interlaced parts are electrically conducting? In the case of A2, the value of the ratio tlit is 17 as a measurement value per square inch.
9 or more; ■ Between a plurality of adjacent intertwined parts in a constant length in the longitudinal direction of each yarn constituting the knitting fabric, the number of intertwined parts that are electrically insulated is ml.
and the number of intertwined parts that are electrically conductive is t” m
2, the value of the ratio ml/m2 shall be 179 or more as measured value per inch.

If electrodes are attached to any two points on a sheet-like object as described above and the sheet-like object between the electrodes is fully extended, the electrical resistance between the electrodes on the sheet-like object will decrease, so it is possible to determine whether or not there is a decrease in the electrical resistance. By measuring the extent between two electrodes, it is possible to determine whether or not the object under test has elongated and the degree of elongation. In addition, since these sheet-like materials, especially the latter deformed conductive knitted fabrics, can undergo a considerable amount of elongation deformation, we have investigated the elongation behavior of the specimen that undergoes a considerable amount of elongation deformation, that is, the presence or absence of elongation, and the extent of elongation.

It is possible to detect the frequency of compression accompanied by expansion.

In the following description, the sheet-like material is referred to as an elongated conductive sheet, and the element is referred to as an elongated conductive element since electrodes are provided on the elongated conductive sheet.

Although the elongated conductive element configured in this way exhibits excellent performance in detecting the elongation behavior of a test object that undergoes a considerable amount of elongation deformation, it has the following problems when attached to the test object and used. Has 2. In other words, since the electrodes of the elongated conductive element having the above structure are exposed, the elongated conductive element can be used as it is as a test object or an object in which the elongated conductive element is incorporated and which itself is not electrically insulated. If installed, there is a risk of electrical leakage. If there is a current leakage, it is undesirable because the current leakage causes electrical stimulation to the subject, short-circuiting of the circuit incorporating the elongated conductive element, and failure of the electronic components. Furthermore, when electric leakage occurs, a problem arises in that the elongated conductive element does not correctly detect the elongated behavior of the object to be tested.

The present invention solves the problems in use of the elongated conductive element previously proposed by the same applicant as the applicant of the present invention, and leaks current to a test object or an object in which the elongated conductive element is incorporated during use. It is an object of the present invention to provide an elongated conductive element that can accurately detect the elongation behavior of a test object without causing any damage.

Means for Solving Problems> The object of the present invention is to provide a stretched conductive sheet whose electrical resistance value decreases when stretched in any direction, and a predetermined interval in the stretching direction of the stretched conductive sheet. Isolation from the specimen is achieved by means of an elongated conductive element, characterized in that it comprises at least two electrodes attached with a gap between them, and at least one side is formed in an insulating state.

Various means can be used to bring the elongated g4'gJL element into an insulating state to prevent electrical leakage, and the types can be selected and used depending on the manner in which the elongated conductive element is used. For example, there is a method in which the entire elongated conductive element connected to the electrode and the leads M&W is embedded in an electrically insulating polymer nystomer by coating, dipping, spraying, or other means.

The electrically insulating polymer elastomer herein refers to an elastic bilimer having a degree of elongation that does not inhibit the elongation of the elongated conductive element, such as natural rubber, urethane,
Any synthetic polymer elastomer such as silicone, fluororubber, butanoene rubber can be used, but it is necessary that the electrical resistance value obtained by the measuring means described in the examples in a state where the elongated conductive element is embedded is 10 6 Ω or more. Therefore, electrical insulation here means that the electrical resistance value satisfies the above conditions.

Also, above-mentioned - air insulation! One example is a method in which a film or sheet-like material of l:iA molecular elastomer is adhered to at least one side of an elongated conductive element. In addition, a stretchable electrically insulating fabric (for example, a woven, nonwoven, or knitted fabric made of crimped yarn or stretchable fibers) can be used to connect at least one side of the elongated conductive element with N or zigzag stitches. It may be sewn using a method that does not interfere with the metal.

In addition, for elongated conductive elements in which electrodes and lead wires are attached to an elongated conductive sheet with an electrically insulating nidistomer sheet bonded to one side, only the electrode part is made of natural synthetic polymer-based or inorganic material-based electrical insulation. Any type of adhesive tape may be used to fully bond the adhesive tape.

Note that some of the methods described above may be used in combination.

2×4 extension of the test object-insulated elongated conductive element according to the present invention
- As a type element, an elongated conductive element equipped with all elongation suppressing members, which was filed on the same day as the present application under the name of "Elongated conductive element of action elongation setting type" by the same applicant as the applicant of the present invention, was used. It's okay. This action elongation setting type elongation conductive element consists of an elongated conductive sheet whose 'μ electrical resistance value decreases when elongated in any direction, and a predetermined interval in the elongation direction of the elongated 4-permissive sheet. The working elongation of an elongate conductive element comprising at least two electrodes attached to a predetermined elongation and/or
Alternatively, at least one elongation suppressing member that can be set to a predetermined elongation or less is provided in conjunction with f: %.

The elongation suppressing member may be a material with a higher tensile elastic modulus than the elongated base sheet, or a material whose initial tensile elastic modulus is lower than that of the elongated conductive sheet, but which has a high tensile elastic modulus at a predetermined elongation. For example, a urethane thread covered with an ester filament can be used.

When the former elongation suppressing member is installed alongside the elongated conductive element, it may be installed with a length corresponding to the predetermined elongation, and in the case of the latter elongation suppressing member, the elongation can be suppressed by incorporating the slack rod. All you have to do is make the parts and install them together without any slack. In addition, when the elongation suppressing member is used in an element with the test object insulated elongated conductor of the present invention shown in FIG. need to be placed.

The predetermined elongation here differs depending on the purpose of use.

For example, when using an elongated conductive element as a switch element such as a safety switch or a security switch, if the resistance value of the elongated conductive element is set just before the elongation value starts to decrease from the insulating state of 1O6Ω, a malfunction will occur even with a slight elongation deformation. This makes it a highly responsive switch. On the other hand, when detecting a physical displacement such as elongation from a change in the resistance value of the elongated conductive element, an elongation suppressing member is placed in a region where the relationship between the elongated deformation of the elongated conductive element and the logarithm of the resistance value is a linear relationship. By setting the effective elongation of the elongated conductive element using Furthermore, excessive elongation may be applied to the elongated conductive element during use, causing changes in the properties of the elongated conductive element.
In order to prevent breakage, the upper limit of the effective elongation of the elongated conductive element may be set to the limit elongation at which the elongated conductive properties are maintained using an elongation suppressing member.

If at least one side of the above-mentioned action-stretch type elongated conductive element is insulated, highly accurate measured values can be obtained, and errors caused by electrical leakage can be eliminated.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, which illustrate one embodiment of a test object insulating elongated conductive element according to the present invention.

FIG. 1 shows an example of an elongated conductive element insulating a test object according to the present invention, in which the elongated conductive element is embedded in an electrically insulating polymeric elastomer. That is, in the example shown in FIG. 1, dielectric breakdown films 2 are laminated on both sides of a stretched conductive sheet 3, and copper electrode plates 4 are attached to both ends of the laminate with conductive resin 5.

Lead wires 7 are connected to the electrode plates 4 at both ends through the soldered portions 6, respectively. Further, the elongated conductive sheet 3, including the electrode plate 4 and the lead wires near the electrode plate 4, is embedded in an electrically insulating elastomer.

In the sandwiched object insulation type elongated conductive element shown in FIG. 1, a deformed conductive fabric is used as the elongated conductive sheet. As mentioned above, this deformed conductive fabric is a fabric whose electrical resistance decreases when stretched in any direction, and is in an electrically insulated state among all intertwined parts in a predetermined area of the fabric. If the number of intertwined parts in
The value is 179 or more as measured per square inch, and the intertwined parts of adjacent yarns at a constant length in the longitudinal direction of each yarn constituting the fabric are electrically insulated. When the number of intertwined parts is tmt and the number of electrically conductive intertwined parts is t'mz, the ratio m 1 /m zO value is 179 or more as a measured value per inch. This is a fabric that satisfies both the above conditions.

The electrically insulated state here means a state in which the electrical resistance value between two needle terminals is 106Ω or more as determined by the electrical resistance measurement method described in the examples, and electrically conductive state. Similarly, the state means a state in which the electrical resistance value between two needle terminals is less than 106Ω.

The confounding part here refers to the part where each prefecture intersects, and does not necessarily have to be in contact. In the case of woven fabrics, it is the intersection of warp and weft yarns, and in the case of knitted fabrics, it is the intersection of loops.

The intertwined part that is electrically insulated or the intertwined part that is electrically conductive here refers to a part where two intertwined threads are electrically insulated through the intertwined part, Alternatively, it means a part that is electrically conductive.

Moreover, the term "between adjacent interlaced parts" more precisely means the part between the centers of the interlaced parts, and means the area between the centers of adjacent interlaced parts of one thread. Also, between interlaced parts that are electrically insulated or electrically conductive means that the adjacent interlaced parts mentioned above are electrically insulated or electrically conductive. It means something.

The deformed conductive fabric used here is formed of a plain weave. Plain weave is preferable because it has a dense structure and is excellent in repeated durability, and its resistance value changes with high sensitivity to minute deformations. However, the deformed conductive fabric may be formed of twill weave or satin weave. A knitted fabric may also be used. The texture of knitted fabrics is warp knitting.

Either latitude is fine, tricot knitting, or jersey knitting.

Any of rubber knitting, noyal knitting, etc. may be used, but pearl knitting is particularly preferable because substantially uniform deformation conductivity can be obtained in any direction of the knitting structure. In addition, the deformation conductivity with respect to minute deformation and large deformation is determined by the structure of two knitted fabrics (
This can be achieved by appropriately selecting the thread thickness, density, thread size, etc. The shape of the knitted fabric includes all shapes that use the structure of the knitted fabric, such as sheet-like, bicylindrical, etc.

The deformed conductive fabric used here is formed using ester multifilament (T-T), but in addition to that, it can also be used as a thread to groove the knitted fabric using ordinary melting.

Monofilaments or multifilaments spun by a wet spinning machine, spun yarns made of short fibers, twisted yarns of these yarns, films, sheets, slits, elongated objects, or aggregates thereof can be used. In addition to esters, these materials include all electrically insulating synthetic polymers such as nylon, synthetic fibers such as cellulose and other regenerated cellulose fibers, electrically insulating natural polymers such as natural rubber, and electrically insulating inorganic materials such as glass. Fibers etc. can be used.

The production of the above-mentioned modified four-conductor knitted fabric begins with a knitted fabric made from electrically insulating fibers entirely coated with a conductive substance by means such as plating, coating, or thermal spraying, or an electrically insulating knitted fabric. A temperature range knitted fabric is prepared by adding a conductive substance to the fabric by plating, coating, thermal spraying, etc., and this knitted fabric is subjected to ultrasonic waves, high-speed jetting of water or air, and laminar flow with a large difference in flow velocity. This is carried out by applying physical stress, such as in the medium in which the yarn is being formed, to selectively completely peel off the conductive material at and between the intertwined parts of the yarn. Therefore, only a specific part of the yarn that takes over the deformed conductive knitted fabric is electrically insulated, and the other parts are plated with conductive substances such as copper, nickel, silver, and carden.
Conductivity is imparted by conductive means such as coating or thermal spraying. In particular, in the case of multifilaments or spun yarns, each filament or short fiber comes into contact with each other under minute stress, which is more preferable for forming a highly sensitive deformable conductive knitted fabric.

Alternatively, a deformed conductive fabric obtained by forming a fabric in which either the warp or the weft is a conductive yarn and the other is an insulating yarn and cutting this fabric in the bias direction may be used. In order to completely improve the durability of the elongated conductive sheet of the elongated groove element, an elastomer may be laminated on at least one side of the deformed conductive knitted fabric.

In the elongated conductive element shown in Figure 1, a copper plate is used as an electrode, but in addition to this, metal plates such as aluminum, brass, and stainless steel, which are normally used as electrodes, as well as fabrics and nidistomer sheets, are used with metal plating and coating. Alternatively, a conductive fabric or a conductive elastomer sheet that has been completely imparted with conductivity by thermal spraying or mixing with a conductive filler may also be used.

The connection between the electrode made of a metal plate, conductive fabric, or conductive elastomer sheet and the stretched conductive sheet is made using an isoelectric resin layer t.
- It is preferable to do so through the contact resistance because the contact resistance is low and the mechanical strength against stretching and repetition is increased. The conductive resin layer referred to here includes all commonly used plastic adhesives such as epoxy, acrylic, and ester adhesives, urethane adhesives, latex adhesives, and hot bath melting polymers, such as This layer is made of a conductive resin having a base material such as a polyester resin or a polyamide resin, into which a suitable filler of 40% by volume is mixed. The conductive filler here is made of metals such as nickel, copper, iron, aluminum, gold, silver, alloys thereof, conductive casen, etc.
It is in the form of powder or short fibers. In addition, the thickness of the conductive resin layer must be 1 μm or more, and although it depends on the use of the elongated conductive element, it is usually 2 μm or more and 50 μm or less in thickness when used with the elongated conductive sheet and electrode plate. This is preferable in terms of adhesive strength, contact resistance, and cost, but is not limited thereto. If the thickness of the conductive resin layer is less than 1 μm, the adhesive force will be poor. In addition, when the conductive resin is based on a heat-melting type polymer, it can be used in the form of a sheet or film, which is excellent in terms of operability and is industrially preferred.

In addition, if the surface of the metal plate is finished with an uneven finish,
It has a high adhesive strength with the conductive resin layer and is more likely to cause electrical breakdown, so it is possible to reduce the amount of conductive filler mixed in, and it is also easier to use because it reduces costs and reduces the adhesive strength of the conductive resin layer. preferable.

Further, as the electrode, a tetraelectric hook, eyelet, or crimp terminal metal can be used, and it can also be used in combination with the above-mentioned electrode plate, conductive fabric, or conductive elastomer sheet.

Next, other examples of the test object-insulating elongated conductive element according to the present invention shown in FIG. 2 and subsequent figures will be explained. In the example shown in FIG. 2, two electrically insulating polymeric elastomer films 1' are bonded to both sides of a stretched conductive sheet 8 to which all electrode plates are attached. In the example shown in FIG. 3, an electrically insulating polymeric elastomer film 1'' is bonded to one side of an elongated conductive sheet 8' to which an electrode plate is attached.

In the example shown in FIG. 4, a dielectric breakdown film 2 is laminated on one side of a stretched conductive sheet 3', an electrically insulating elastomer film 9 is laminated on the other side, and copper electrode plates 4 are attached to both ends of the laminate by conductive resin 5'. ' is attached.

Lead wires 7 are connected to the electrode plates 4' at both ends through the soldered portions 6'. In this case electrode plate 4'
Because of the leakage, an electrically insulating adhesive tape is bonded to the lower part of the electrode plate 4 as shown in the figure.

In the example shown in FIG. 5, fabrics 11i having stretchable gold are arranged on both sides of the stretchable conductive sheet 8'' to which electrodes are attached, and the electrode plate portions are sewn to the upper and lower fabrics 11 as indicated by number 13, and the stretchable conductive sheet 8'' is Place the number 1 on the top and bottom fabrics 11 of the sex sheet.
As shown in 2, it is sewn in a staggered pattern.

The means for imparting insulation to the elongated conductive element is the first
It is not limited to the means illustrated in FIGS.
In short, any embodiment can be applied as long as it prevents current leakage to the test object or the object in which the elongated conductive element is incorporated during use, and does not affect the elongation behavior of the elongated conductive element.

Note that the elongated conductive sheet may be used on a sheet-like material other than the above-mentioned deformed conductive knitted fabric.

Embodiments> Hereinafter, detailed embodiments of the specimen-insulating type elongated lead pin according to the present invention will be explained. However, it is clear that the invention is not limited to these specific examples.

Ester taffeta (diameter 50d/24) manufactured by Asahi Kasoko Kogyo Co., Ltd.
f, latitude 75d/36f) 't-Sodium hydroxide aqueous solution (809/l), wastage processing at 100℃ (loss rate 20%
) and sensitized in a bath with a 5nC42:hydrochloric acid ratio of 3=10, and after washing and dehydration, a PdCl2:hydrochloric acid ratio of 1
: Activated in 15 baths, washed with water and dehydrated, then NtCt2'
6H20t NaHPO2'H20, sodium citrate.

Ni-plated ester taffeta was produced by treatment at 90° C. for 2 minutes in a bath containing NH2Cl and aqueous ammonia at a ratio of 1:1:3:2:2. This was cut into f 10 tyn x 10 mouth size samples and placed in a double cylindrical laminar flow generator (
The inner cylinder rotates at high speed, the inner cylinder has an inner diameter of 25 crn, and the outer diameter of the inner cylinder is 10 cm.
00 rpm for 300 minutes to obtain an elongated conductive sheet.

Next, a commercially available urethane-based nidistomer resin (solvent DMF,
After coating a template paper with a total of 90 μm (solid content: 10 wt%), it was dried at 100°C for 3 min.
Thermal adhesive transfer at 110℃ with a pressure of g/cm2 and 100℃
It was dried for 30 minutes to obtain an elongated conductive sheet (■).

In the same way, two urethane films of raw raw material made with a gauge of 90 μm and 300 μm, respectively, were laminated on both sides of the stretched conductive sheet, and the stretched conductive sheet
I got everything.

Next, stretch conductive sheet ■, ■f 1 cm width x 5 crn
Cut the length in the bias direction, bond a 40 μm thick copper plate to the front and back sides of one length from both ends with conductive adhesive, solder lead wires to both ends, and stretch by 20% to create two lead wires. Elongated conductive elements ① and ② in which the resistance value between the two electrodes was reduced from 4.5×10 6 Ω to 60 Ω were fabricated.

Elongated conductive element ■t, after dipping in commercially available 21 anti-mold silicone varnish (for flexibility; solid content 40 wt%, solvent toluene), air-dried for 10 to 30 minutes, 1.30'CX 1 h
The cycle of drying x++ was repeated a total of three times to obtain a sample 1, which is an elongated conductive element of the present invention. Next, both sides of the elongated conductive element (■) were coated with release paper using a 400 μm gauge, and dried at 100°C for 4 min.
This was thermally adhesively transferred at 110° C. under a pressure of 2, dried at 120° C. for 1 hour, and cut out into a 2 cm wide×10 crIt length to obtain a sample &2 made of the elongated conductive element of the present invention. In the same manner, the above transfer film was laminated only on one side of the elongated conductive sheet (1) to obtain a sample iK B which was made of the elongated conductive element of the present invention. Next, the elongated conductive element (■) is sandwiched between two pieces of spandex and nylon 60 cross-knit fabric with a width of 2G and a length of 6 crn, and the area around the lead wire and electrode part is sewn using a sewing machine, and the elongated conductive element is sewn between the two electrode plates. A zigzag stitch was made along the element (2) to obtain a sample of the elongated conductive element of the present invention.

Furthermore, commercially available electrically insulating vinyl tape was pasted on the surface of the electrodes on both sides of the elongated conductive element (lower side in Figure 4) to which the electrically insulating urethane film (coated with 300 μm dirge) was attached. 9. Sample A5, which is an elongated conductive element of the present invention, was prepared.

The electrical insulation properties of samples 1 to 5 of the present invention were determined by using a Toyo Baldwin back tensile tester (Tensiron), two gentle poles (metallic tip), and five scissors, and an elongated conductive element of the present invention (all 2).
After stretching at zero tension, the electrical resistance value was measured by applying the terminal of a commercially available tester to the insulated sides of the electrode portions at both ends that were not sandwiched by the Tensilon jig. The results are summarized in Table 1 together with the elongated conductive element (2) as a comparative example. Table 1
As can be seen from the drawings, it can be seen that the elongated conductive element of the present invention maintains electrical insulation properties at least on the insulated side.

Margins below <Effects of the Invention> Since the test object-insulated elongated conductive element according to the present invention is constructed as described above, elongated deformation that could not be performed using conventional sensor element sounds, especially a considerable amount of elongation, can be achieved. It is possible to detect the entire changing elongation behavior of the test object, and it is possible to accurately detect the elongation behavior of the test object without causing electrical leakage to the test object or the object in which the elongated conductive element is incorporated during use. It is an elongated conductive element.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view schematically showing an example of the test object-insulated elongated conductor element according to the present invention, and FIG. 2 to FIG. FIG. 2 is a schematic diagram showing a modified example of the element. 3 and 5 are perspective views, and FIG. 4 is a longitudinal sectional view. 1... electrically insulating elastomer, 11, 1//...
・Electrically insulating elastomer film, 2,2'...Dielectric breakdown film laminated on stretched conductive sheet, 3,3
'... Stretched conductive sheet, 4, 4'... Electrode plate, 5
, 5'... Conductive resin layer, 6, 6'... Soldering part, 7.7'. 7", 7"/, 7////...Lead wire,
8, 8', 8''... Elongated electrically conductive element attached with electric box plate, 9... Electrically insulating elastomer film bonded to elongated S conductive sheet, 10... Electrically insulating adhesive tape, 11...Electrically insulating stretchable fabric, 12.1
3... Sewing thread.

Claims (1)

[Claims] 1. A stretched conductive sheet whose electrical resistance value decreases when stretched in any direction, and at least two electrodes attached at a predetermined distance in the stretching direction of the stretched conductive sheet. What is claimed is: 1. An elongated conductive element insulated from a specimen, characterized in that at least one surface is formed in an insulating state.